Furnace resistor mounting



Dec. 15, 1925- A. KEENE FURNACE RESISTOR MOUNTING Filed Nov. 20, 1925INVENTOR TORNEY Alvin D. Keene Fig WITNESSES Patented Dec. l5, 1925.

UNITED STATES PATENT OFFICE.

ALVIN I). KEENE, OF PITTSBURGH, PENNSYLVANIA, ASSIGNOR TO WESTINGHOUSEELECTRIC & MANUFACTURING COMPANY, A. CORPORATION OF PENNSYLVANIA.

I FURNACE RESISTOR 'MOUNTING.

Application filed November 20, 1923. Serial No. 675,864.

To all whom it may concern.

Be it known that I, ALVIN 1). KEENE, a citizen of the United States, anda resident of Pittsburgh, in the count of Allegheny and State ofPennsylvania, ave invented a new and useful Improvement in FurnaceResistor Mountings, of which the following is a specification.

My invention relates to furnaces and particularly to electrically-heatedresistance furnaces.

One object of my invention is to provide a relatively simple resistormounting for electrically heated resistance furnaces.

A further object of my invention is to provide a relatively simple meansfor mounting section, of an electrical resistance furnace a resistor asa unit.

In practicing my invention, I provide a plurality of refractoryheat-insulating walls enclosing a furnace chamber and supporting aplurality of spaced sets of refractory members, of substantiallyT-shape, projecting into the furnace chamber. The refractory members ofT-shape are spaced apart laterally, and relatively thin, narrow,perforated, refractory plates are held by the outer ends of the membersof T-shape. A relatively heavy resistor member, preformed to comprise aplurality of straight and substantially parallel-extending return bentconvolu tions, is held by the perforated plates whereby the convolutionsextend substantially parallel to the furnace walls and closely adjacentthereto.

In the single sheet of drawings,

Figure 1 is a view in vertical section, of an electrically heatedfurnace embodying my invention; I

Fig. 2 is a fragmentary view, partly in side elevation and partly inlongitudinal embodying my invention; Fig. 3 is a fragmentary View, infront elevation, of a refractory member, a resistor, and refractorysupporting members;

F ig. 4 is a fragmentary view, partly in longitudinal section and partlyin side elevation, of an electrical resistance furnace showing a furtherembodiment of my invention; and

' Fig. 5 is a viewfin front elevation, of a plurality of refractorymembers, and resistors as shown in that embodiment of my invention inFigure 4..

stantially T-shape, are more particularly illustrated in Figures 2, .3and 4. of v the drawing and, as are shown, are provided with twodepressions 11 and 12 of unequal depths, located in opposing surfacesof, and ad acent, the end of the T-shaped member. As hereinbeforestated, the members 10 are located in spaced relation and relativelythin and narrow refractory members or bars 15 each having a plurality ofperforations extending laterally through the plate between oppositesurfaces, are supported by cooper ating members 16 immediately adjacentthe wall of the furnace.

In another embodiment, as shown inFigure 3, the depressions, 11 and 12have substituted thereforthe laterally extending grooves 13 and 14.

Means for preventing lateral movement of the members 15 relatively tothe supporting members 10 may comprise metal rods 16,

of substantially L-shape, which are dropped into spaced openings 17, thewidth of the member 15 being such as to extend substantially between thetwo members 16 to be held thereby against lateral movement relatively tothe supporting member 10.

A resistor'inember 18 is located between adjacent perforations 19 andextends between and beyond these resistor-supporting members andcomprises a plurality of straight and substantially parallel-extendingreturn-bent convolutions of a relatively heavy resistor bar or" rodwhich 1s self.sup porting between and beyond the resistor supportingmembers 15.

The resistor member is held against the bars 15 by means of metalmembers 20, ofsubstantially hair-pin shape, that extend through thehereinbefore mentioned perfora tions, the ends of the members 20 beingbent over against one surface ofthe bar 15.

each other.

While I have illustrated the heating elements as located in the end andside Walls only, the same general construction may be employed in theroof of a furnace.

In assembling the parts embodymg the furnace structure the supportingmembers of T-shape are located in proper spaced relation, substantiallyas illustrated 1n the drawing, and in mounting the heating element,which has previously been secured to the resistor supporting members byclamps of-substantially hair-pin shape 20, the 1ndividual members '15may be slipped into place back of the overhanging flanges by a tiltingand lateral and downwardly directed movementof the entire unit. If thestructure such as illustrated in Fig. 3 isused,

the unit is slipped into place behind the overhanging flan es ofthemember of T- shape adjacent the walls and the locking keys 21 and 22 maythen be placed in position, thus, completing the installation of theresistor member.

Various modifications may be made in the device embodying my inventionand I desire that only such limitations shall be placed thereon as areimposed by the prior art or are specifically set forth in the ap-'pended claims.

I claim as my invention:

1. In an electric resistance furnace, in combination, a refractory wall,a plurality of-refractory members, of substantially T- shape, supportedby said wall, a' resistorsupporting member extendin between saidrefractory members and a plurality of resistor members secured to saidresistor-supporting members on opposite sides thereof.

2. In an electric resistance furnace, in combination, a refractory wall,a plurality i of refractory members, of substantially T- 'shape,projectin from said wall, a resistor supporting mem er extending betweensaid refractory members, and .a plurality of remembers, extendingbetween said re sistor members secured to said resistor-supporting.member. 1

3. In an electric resistance furnace, in combmatlon, a plurality ofrefractory walls enclosing a furnace chamber, a plurality of refractorymembers,- of substantially 1'- shape, s pported bysaid wall, a pluralityof rela vely narrow [res1stor-supfp0rting ractory members, and aresistor member secured to the resistor-supporting members whereby theresistor-supporting members and resistor member may be unitarily placedin an operative position.-

4. In an electric furnace, in combination, a plurality of refractorWalls enclosing a furnace chamber, a p urality of refractory memberssupported by one of said walls in said chamber, a plurality ofresistor-supporting members extending between said refractory membersand a .plurality of alternately spaced resistor members secured todifferent surfaces of said refractory members.

,5. In an electric resistance furnace, in

combination, a refractory wall, a plurality of spaced sets of refractorymembers, of substantially T-shape, having laterally grooved oppositesurfaces supported by said wall, resistor-supporting members extendingbetween spaced pairs of said refractory members, and a plurality ofresistor members secured to said resistor-supporting members.

6. In an electric resistor furnace, in combination, a plurality ofrefractory walls enclosing a furnace chamber, a plurality of refractorymembers supported by one of said walls and projecting into said chamber,a perforated resistor-supporting member extending between saidrefractory members, a

resistor member and means associated with said perforations in saidrefractory member whereby said resistor member is secured to saidresistor-supporting member.

7. In an electric resistance furnace, in combination, a plurality ofrefractory walls enclosing a furnace chamber, a plurality of refractorymembers supported by one of said walls and projecting into said chamber,a perforated resistor-supporting member extending between saidrefractory members, a resistor member, and a relatively narrow resistorsecuring 'means associated with the perforations in said refractorymember whereby a maximum resistor radiating surface is maintained. p Y

8. In an electric resistance furnace, in combination, a refractory wall,a plurality of spaced sets of aligned and spaced refractory members, ofsubstantially T-shape, supported by said wall, each member havingdepressions in opposite surfaces, and resistor-supporting membersextending be- 1 tween opposed pairs of said refractory members, havingtheir ends operatively located respectively in said depressions by atilting and lateral and downwardly directed move ment, and a pluralityof resistor members secured to the opposite surfaces of theresistorsupporting members.

Inan electric resistance furnace compris ng a plurality. of refractorywalls en closing a furnace chamber, aheater element comprising aplurality of resistors, a. plurality of refractory resistor supports andmeans for securing said resistors to said supports in alternately spacedpositions.

' 10. In an electric resistance furnace comprising a plurality ofrefractdry walls enclosing a furnace chamber, a heater elementcomprising a plurality of resistors, a plurality of perforatedrefractory resistance supports and a relatively narrow means asingsurface is maintained.

In testimony whereof, I have hereunto subscribed my name this 14th dayof November 1923.

ALVIN D. KEENE.

